MICROCHIP DM182015-2 Operating instructions

Brand: MICROCHIP

Model: DM182015-2

Type: Operating instructions

RS232 Serial Accessory Board

User's Guide

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC,

KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,

PIC32 logo, rfPIC and UNI/O are registered trademarks of

Microchip Technology Incorporated in the U.S.A. and other

countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,

MXDEV, MXLAB, SEEVAL and The Embedded Control

Solutions Company are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,

ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial

Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified

logo, MPLIB, MPLINK, mTouch, Omniscient Code

Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,

PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,

TSHARC, UniWinDriver, WiperLock and ZENA are

trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated

in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

ISBN: 978-1-60932-819-1

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Microchip received ISO/TS-16949:2002 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures

are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping

devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

RS232 SERIAL

ACCESSORY BOARD

USER'S GUIDE

Table of Contents

Preface ...........................................................................................................................1

Chapter 1. Overview

1.1 Introduction ..................................................................................................... 5

1.2 RS232 Serial Accessory Board ...................................................................... 5

Chapter 2. RS232 Serial Accessory Board Hardware

2.1 Introduction ..................................................................................................... 7

2.2 Plugging into the PIC18 Wireless Development Board ..................................7

Appendix A. RS232 Serial Accessory Board

A.1 Introduction .................................................................................................. 11

A.2 RS232 Serial Accessory Board Schematic .................................................. 11

A.3 RS232 Serial Accessory Board PCB Layout ............................................... 12

A.4 RS232 Serial Accessory Board Bill of Materials ..........................................14

Worldwide Sales and Service ....................................................................................17

RS232 Serial Accessory Board User’s Guide

NOTES:

RS232 SERIAL

ACCESSORY BOARD

USER’S GUIDE

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

RS232 Serial Accessory Board User’s Guide. Items discussed in this chapter include:

•Document Layout

•Conventions Used in this Guide

•Warranty Registration

•Recommended Reading

•The Microchip Web Site

•Development Systems Customer Change Notification Service

•Customer Support

DOCUMENT LAYOUT

This document describes how to use the RS232 Serial Accessory Board to evaluate

and experiment with Microchip wireless solutions. The manual layout is as follows:

•Chapter 1. “Overview” – This chapter introduces the RS232 Serial Accessory

Board and its features.

•Chapter 2. “RS232 Serial Accessory Board Hardware” – This chapter provides

a brief description of the hardware components on the board.

•Appendix A. “RS232 Serial Accessory Board” – This appendix illustrates the

RS232 Serial Accessory Board schematics followed by the RS232 Serial

Accessory Board PCB Layout and the RS232 Serial Accessory Board Bill of

Materials.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs

and/or tool descriptions may differ from those in this document. Please refer to our web site

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.

For the most up-to-date information on development tools, see the MPLAB® IDE on-line help.

Select the Help menu, and then Topics to open a list of available on-line help files.

RS232 Serial Accessory Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog “Save project before build”

Underlined, italic text with

right angle bracket A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format,

where N is the total number of

digits, R is the radix and n is a

digit.

4‘b0010, 2‘hF1

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can be

any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | } Choice of mutually exclusive

arguments; an OR selection errorlevel {0|1}

Ellipses... Replaces repeated text var_name [,

var_name...]

Represents code supplied by

user void main (void)

{ ...

}

Preface

WARRANTY REGISTRATION

Please complete the enclosed Warranty Registration Card and mail it promptly.

Sending in the Warranty Registration Card entitles users to receive new product

updates. Interim software releases are available at the Microchip web site.

RECOMMENDED READING

This user's guide describes how to use RS232 Serial Accessory Board User’s Guide.

Other useful documents are listed below. The following Microchip documents are

available and recommended as supplemental reference resources.

Readme Files

For the latest information on using other tools, read the tool-specific Readme files in

the Readmes subdirectory of the MPLAB IDE installation directory. The Readme files

contain update information and known issues that may not be included in this user’s

guide.

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

•Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

•General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchip sales offices,

distributors and factory representatives

RS232 Serial Accessory Board User’s Guide

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip

products. Subscribers will receive e-mail notification whenever there are changes,

updates, revisions or errata related to a specified product family or development tool of

interest.

To register, access the Microchip web site at www.microchip.com, click on Customer

Change Notification and follow the registration instructions.

The Development Systems product group categories are:

•Compilers – The latest information on Microchip C compilers and other language

tools. These include the MPLAB C18 and MPLAB C30 C compilers; MPASM™

and MPLAB ASM30 assemblers; MPLINK™ and MPLAB LINK30 object linkers;

and MPLIB™ and MPLAB LIB30 object librarians.

•Emulators – The latest information on Microchip in-circuit emulators.This

includes the MPLAB ICE 2000 and MPLAB ICE 4000.

•In-Circuit Debuggers – The latest information on the Microchip in-circuit

debugger, MPLAB ICD 2.

•MPLAB® IDE – The latest information on Microchip MPLAB IDE, the Windows®

Integrated Development Environment for development systems tools. This list is

focused on the MPLAB IDE, MPLAB SIM simulator, MPLAB IDE Project Manager

and general editing and debugging features.

•Programmers – The latest information on Microchip programmers. These include

the MPLAB PM3 and PRO MATE® II device programmers and the PICSTART®

Plus and PICkit™ 1 development programmers.

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com

DOCUMENT REVISION HISTORY

Revision A (January 2011)

• This is the initial release of this document.

RS232 SERIAL

ACCESSORY BOARD

USER’S GUIDE

Chapter 1. Overview

1.1 INTRODUCTION

This chapter introduces the Recommended Standard 232 (RS232) Serial Accessory

Board and provides a brief description of its features.

The RS232 Serial Accessory Board is a demonstration and development daughter

board that is used with the PIC18 Wireless Development Board or with any other

development boards that have the compatible interface. This daughter board can

interface to the development board and any I2C board, like LCD Serial Accessory

Board. The demonstration program for RS232 board can be downloaded from the

Microchip website: http://www.microchip.com/wireless

The RS232 is a standard for serial binary single-ended data and control signals that are

connecting between the Data Terminal Equipment (DTE) and the Data Communication

Equipment (DCE). In general, computers, printers, and terminals are classified as DTE,

while a modem is classified as DCE. RS232 is commonly used in serial ports.

1.2 RS232 SERIAL ACCESSORY BOARD

The interface between the RS232 Serial Accessory Board and the development board

is through the Serial Accessory Port. The Serial Accessory Port basically supports the

external sensors and the modules such as RS232 Serial Accessory Board through SPI,

I2C™ or USART connection.

The RS232 Serial Accessory Board features include:

• RS232 port to connect to a PC

• RS232 level translation from a single 3.0 V–5 V supply voltage

• Automatic Sleep mode (It must be enabled. For more information, see

Section 2.2.6.1 “Enabling Automatic Sleep Mode”)

•I

2C compatible interface to I2C accessory boards like LCD Serial Accessory

Board

The RS232 Serial Accessory Board can be used with several development boards like,

the PIC18 Wireless Development Board. Figure 2-1 illustrates the features of RS232

Serial Accessory Board.

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

NOTES:

RS232 SERIAL

ACCESSORY BOARD

USER’S GUIDE

Chapter 2. RS232 Serial Accessory Board Hardware

2.1 INTRODUCTION

This chapter introduces the hardware layout of the RS232 Serial Accessory Board. It

is built using the MAX3221 RS232 transceiver chip which contains a pair of transmitter

and receiver.

2.2 FEATURES OF THE RS232 SERIAL ACCESSORY BOARD

Figure 2-1illustrates the ports and features of the RS232 Serial Accessory Board.

FIGURE 2-1: RS232 SERIAL ACCESSORY BOARD CONNECTIONS

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

RS232 Serial Accessory Board has the following connectors:

• Serial Accessory Port Input

• Serial Accessory Port Output

• Logic Tester Header (optional)

•I

2C™ Accessory Port

•RS232 Port

2.2.1 Serial Accessory Port Input

The Serial Accessory Port Input header is connected to the Serial Accessory Port of

the development board and supports I2C, SPI and USART interfaces. For more

information on the protocol and port pin details, and configuration, refer to the “8-Bit

Wireless Development Kit” User’s Guide (DS70654A).

2.2.2 Serial Accessory Port Output

The Serial Accessory Port Output socket enables the attachment of the additional

accessory modules to the board by expanding the development board's Serial

Accessory Port. This port supports the I2C, SPI and USART interfaces. For more

information on the protocol and port pin details, and configuration, refer to the “8-Bit

Wireless Development Kit” User’s Guide (DS70654A).

2.2.3 Logic Tester Header

The Logic Tester Header helps the user in hardware debugging. It provides direct

access to the interface lines of the development kit's Serial Accessory Port. It enables

the user to clip the logic probes to the appropriate pin header and monitor the signals.

The header is optional and the user can populate it if required for further developments.

2.2.4 I2C Accessory Port

The I2C Accessory Port is the subset of the development board's Serial Accessory

Port. I2C Accessory Port is designed to connect I2C sensors or accessory devices. I2C

Accessory Port also handles LCD Serial Accessory Board.

Figure 2-2 illustrates the I2C Accessory Port pin out.

FIGURE 2-2: I2C ACCESSORY PORT PIN OUT

Note 1: The I2C and SPI modes (hardware) cannot run parallely.

2: The USART and SPI cannot run parallely. Only I2C and USART can be

used together in the RS232 Board.

123456

3.3 VDC

SCL SDA GND

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

2.2.5 RS232 Port

The RS232 Port connects the two systems through their DB9 interfaces without a

modem. It is generally called back-to-back or NULL modem connection. Figure 2-3

illustrates the DB9 connector pin out.

FIGURE 2-3: RS232 CONNECTOR PIN OUT

2.2.6 Automatic Sleep Mode

The RS232 Serial Accessory Board has an automatic Power-Saving mode that is

handled automatically by the RS232 chip if enabled. The RS232 Serial Accessory

Board enters the Sleep mode and uses approximately 1uA of supply current. The

voltage level of pin 2 of the RS232 port connector determines the state of the RS232

Serial Accessory Board. Figure 2-4 illustrates the voltage levels and working mode of

the RS232 Serial Accessory Board.

FIGURE 2-4: RX SIGNAL VOLTAGE LEVELS

12345

6789

GND

Indeterminate

Valid RS232 Level. RS232 Module is in normal mode

2.7 V

0.3 V

-0.3 V

-2.7 V

If signal remains within this region for more than 30 µs, RS232 Module enters

Sleep mode.

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

2.2.6.1 ENABLING AUTOMATIC SLEEP MODE

The RS232 Serial Accessory Board remains in the indeterminate state, if the RS232

external device, which is connected to the RS232 Serial Accessory Board, is unable to

produce the required voltage level to keep the RS232 Serial Accessory Board

operating in a normal mode.

Figure 2-4 illustrates the required voltage levels. To prevent malfunctioning, the

Automatic Sleep mode is disabled using R2 and R3 jumpers.

Table 2-1 lists the possible configuration options.

Note: R3 jumper is not populated.

TABLE 2-1: ENABLING AND DISABLING AUTOMATIC SLEEP MODE

Automatic Sleep Mode R2 R3

Enabled Unpopulated Populated

Disabled Populated Unpopulated

CAUTION

Power to the RS232 Serial Accessory Board should be in the range of 3.0–5.5V. Ensure

that the development or demonstration board that the RS232 Serial Accessory Board is

plugged into meets this voltage requirement or it may damage the devices on board.

RS232 SERIAL

ACCESSORY BOARD

USER’S GUIDE

Appendix A. RS232 Serial Accessory Board

A.1 INTRODUCTION

This chapter illustrates the RS232 Serial Accessory Board schematics followed by the

RS232 Serial Accessory Board PCB layout and the RS232 Serial Accessory Board Bill

of Materials (BOM).

A.2 RS232 SERIAL ACCESSORY BOARD SCHEMATIC

FIGURE A-1: RS232 SERIAL ACCESSORY BOARD SCHEMATIC

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

A.3 RS232 SERIAL ACCESSORY BOARD PCB LAYOUT

The RS232 Serial Accessory Board is a two-layer, FR4, 0.062 inch, plated

through-hole PCB construction.Figure A-1 illustrates the RS232 Serial Acces-

sory Board top silk screen.

FIGURE A-2: RS232 SERIAL ACCESSORY BOARD TOP

SILKSCREEN

Figure A-2 illustrates the RS232 Serial Accessory Board top copper.

FIGURE A-3: RS232 SERIAL ACCESSORY BOARD TOP COPPER

SERIAL ACCESSORY PORT OUTPUT

RS232 SERIAL

ACCESSORY BOARD

R2 R3

C5 U1

C1 C2 R1

I2C ACCESSORY PORT

RS232 PORT

J1 SERIAL ACCESSORY PORT INPUT

02-02192 R1

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

Figure A-4 illustrates the RS232 Serial Accessory Board bottom copper

mirrored.

FIGURE A-4: RS232 SERIAL ACCESSORY BOARD BOTTOM

COPPER — MIRRORED

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

A.4 RS232 SERIAL ACCESSORY BOARD BILL OF MATERIALS

Table A-1 provides the detailed description of the RS232 Serial Accessory

Board Bill of Materials (BOM).

TABLE A-1: RS232 SERIAL ACCESSORY BOARD BILL OF MATERIALS

Reference

IDs Qty Type/Value Description Manufacturer Manufacturer P/N

C1, C5, C6,

C7 40.1 µF Capacitor, Ceramic,

25V, 10%, X7R, SMT

0603

Panasonic - ECG ECJ-1VB1E104K

C2, C3, C4 30.47 µF Capacitor, Ceramic,

10V, 10%, X5R, SMT

0603

Panasonic - ECG ECJ-1VB1A474K

C8 110uF CAP TANTALUM 10UF

6.3V 10% SMD AVX Corporation TAJS106K006RNJ

R1 110 ohms Resistor, SMT 0603 Stackpole Electronics Inc RMCF 1/16 10 1% R

R2 10 ohms Resistor, SMT 0603 Stackpole Electronics Inc RMCF 1/16 0 R

J1 1 SERIAL ACCES-

SORY PORT

HEADER

Connector, Header,

Right Angle, 0.100"

spacing, 0.025" sq.

Mill-Max 800-10-006-20-001000

J2, J3 2SERIAL ACCES-

SORY PORT

SOCKET and

I2C SOCKET

Connector, Socket,

Right Angle, 0.100"

spacing, 0.025" sq.

Mill-Max 801-43-006-20-001000

J5 1 RS232 Female

Connector CONN DB9

FEMALE.318" R/A

NICKEL

Norcomp Inc. 182-009-213R531

U1 1MAX3221ECAE+ IC TXRX RS232

250KBPS SD 16-SSOP Maxim Integrated Prod-

ucts MAX3221ECAE

3SPACER STACK-

ING #4 SCREW

NYLON

Stand-off Keystone Electronics 8834

Unpopulated Parts

R3 1 0 ohms Resistor, SMT 0603 Stackpole Electronics Inc RMCF 1/16 0 R

J4 1 LOGIC TESTER

HEADER Connector, Socket,

0.100" spacing, 0.025"

sq.

Mill-Max

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

Alternative parts for U1

U1 1 MAX3221ECAE+

TIC TXRX RS232

250KBPS SD 16-SSOP Maxim Integrated

Products MAX3221ECAE+T

U1 1 MAX3221CUE+T IC TXRX RS232

250KBPS SD 16-SSOP Maxim Integrated

Products MAX3221CUE+T

U1 1 MAX3221ECUE+

TIC TXRX RS232

250KBPS SD 16-SSOP Maxim Integrated

Products MAX3221ECUE+T

U1 1 MAX3221CDBR IC DRVR/RCVR RS-232

1-CH 16-SSOP Texas Instruments MAX3221CDBR

U1 1 MAX3221ECDBR IC RS232 3V-5.5V

DRVR 16-SSOP Texas Instruments MAX3221ECDBR

U1 1 MAX3221CPWR IC DVR/RCVR RS232

ESD 16TSSOP Texas Instruments MAX3221CPWR

U1 1 MAX3221ECPWR IC RS232 3V-5.5V DRVR

16-TSSOP Texas Instruments MAX3221ECPWR

U1 1 TRS3221CDBR IC DVR/RCVR RS232

ESD SGL 16SSOP Texas Instruments TRS3221CDBR

U1 1 TRS3221ECDBR IC RS232 3V-5.5V

DRVR 16-SSOP Texas Instruments TRS3221ECDBR

U1 1 TRS3221CPWR IC DVR/RCVR RS232

ESD 16TSSOP Texas Instruments TRS3221CPWR

U1 1 TRS3221ECPWR IC RS232 LINE

DVR/RCVR 16-TSSOP Texas Instruments TRS3221ECPWR

RS232 SERIAL ACCESSORY BOARD USER’S GUIDE

NOTES:

Page is loading ...

MICROCHIP DM182015-2 Operating instructions

MICROCHIP DM182015-2 Operating instructions

MICROCHIP DM182015-2 Operating instructions

Related papers

Other documents